Isolation and characterization of a novel cinosulfuron degrading Kurthia sp from a methanogenic microbial consortium
文献类型： 外文期刊
作者： Ruan, Zhiyong 1 ; Zhou, Shan 1 ; Jiang, Shenghua 3 ; Sun, Lei 4 ; Zhai, Yi 5 ; Wang, Yanwei 2 ; Chen, Chao 2 ; Zhao, Bin 1 ;
作者机构： 1.Huazhong Agr Univ, Coll Life Sci & Technol, State Key Lab Agr Microbiol, Wuhan 430070, Peoples R China
2.CAAS, Inst Agr Resources & Reg Planning, Key Lab Microbial Resources Collect & Preservat, Beijing 100081, Peoples R China
3.Stanford Univ, Dept Civil & Environm Engn, Stanford, CA 94305 USA
4.Heilongjiang Acad Agr Sci, Inst Anim Husb, Harbin 150000, Peoples R China
5.Chongqing Acad Agr Sci, Inst Agr Engn, Chongqing 401329, Peoples R China
关键词： Cinosulfuron;Biodegradation;Kurthia sp.;Novel species
期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.7； 五年影响因子：9.4 ）
ISSN： 0960-8524
年卷期： 2013 年 147 卷
页码：
收录情况： SCI
摘要： A novel bacterial strain LAM0713 was isolated from a methanogenic bacterial complexes and identified as Kurthia sp. based on morphological, cultural, physio-biochemical characteristics and analysis of 16S rDNA sequence. Strain LAM0713 was found to be capable of utilizing cinosulfuron as sole nitrogen source for growth over a wide range of temperature (20-40 degrees C) and pH (5.0-9.0). Response surface methodology was used to optimize the degradation conditions. Strain LAM0713 could efficiently degrade 92.4% of initially supplemented 50 mg.L-1 cinosulfuron under the optimum conditions (pH 6.9, 31.8 degrees C) within 5 days. Five intermediates formed during cinosulfuron degradation were detected by liquid chromatography mass spectrometry (LC-MS), and a metabolic pathway for cinosulfuron degradation was proposed via cleavage of the sulfonylurea bridge. It is the first report showing that Kurthia sp. strain could degrade sulfonylurea herbicides, suggesting that strain LAM0713 may provide new insight into microbial degradation of herbicides. (C) 2013 Elsevier Ltd. All rights reserved.
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